Question

Natural length of a spring is 60 cm, and its spring constant is 4000 N/m. A mass of 20 kg is hung from it. The extension produced in the spring is, (Take )

• A. 4.9 cm
• B. 0.49 cm
• C. 9.4 cm
• D. 0.94 cm

Answer 1

Answer: (A)

4.9 cm

Answer 2

If x is the extension produced in spring.

$F = k x$ ⇒ $x = \frac { F } { k }$=